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BD10 223 engine number, which carb ?
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Fisambard
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March 21, 2021 - 9:40 pm
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Can anyone tell me which carb, Mono or 626 my bike should have come with. It’s engine number is BD10 223, (3 speed)

it has a Monobloc at the moment but probably past it’s best

thanks for help

Wayne

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GlenAnderson
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March 21, 2021 - 9:49 pm
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According to my sources, a D10 would have had a 26mm Amal 626 Concentric, with a 150 main jet, a 25 pilot, a no 3 slide, a .105 needle jet and the needle in position 2. 

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Fisambard
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March 21, 2021 - 9:55 pm
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Weren’t the early models Monobloc?

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GlenAnderson
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March 21, 2021 - 10:21 pm
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Fisambard said
Weren’t the early models Monobloc?  

Possibly. My references only list the above, but they also state that the Concentric was introduced in the 1967 model year, so September 66 onwards. The D10, particularly the 3-speed, was a bit of an interim model, with some hangovers from the preceding D7, but not all the improvements the D14/4 saw. I’m afraid I can only offer the information in my book, as my direct experience is with the D1/3/5 machines, and with the engines of the D14/4 and D175. 

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Unitminor
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March 22, 2021 - 1:05 pm
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From the amal reference catalogue 

1966 D10  -  376/323   -  1inch monoblock

1967 D10  - R626/2  -  26mm concentric

Hope that is of help

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Fisambard
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March 22, 2021 - 9:48 pm
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Thanks everyone for input. I have been running a 375/31 up to now without probs, yet last few months been playing up, I ride it all weathers. Starts fine yet recently wouldn’t do more than 500 yards then refused to start again.  Put new rings in it and bought it back to life. Bought a new slide and it wouldn’t fit properly in the Monos bore!
Bitten the bullet now and ordered a new Concentric.

thanks again, ride safe

Wayne

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